CVE-2021-38674: QNAP QTS

Medium severity, CVSS 6.1. EPSS: 0.6% chance of exploitation in the next 30 days.

A cross-site scripting (XSS) vulnerability has been reported to affect QTS, QuTS hero and QuTScloud. If exploited, this vulnerability allows remote attackers to inject malicious code. We have already fixed this vulnerability in the following versions of QTS, QuTS hero and QuTScloud: QuTS hero h4.5.4.1771 build 20210825 and later QTS 4.5.4.1787 build 20210910 and later QuTScloud c4.5.7.1864 and later

Affected products

• QNAP QTS: before 4.5.4.1787 (fixed in 4.5.4.1787)
• QNAP Quts Hero: before h4.5.4.1771 (fixed in h4.5.4.1771)
• QNAP Qutscloud: before c4.5.7.1864 (fixed in c4.5.7.1864)

Published 2022-01-07. Last modified 2026-06-17.